Soundfile

This is a pre-release

Includes updated binaries for Windows 32/64, and macOS x86_64/arm64.

- ~Fixed wheel OS tag on macOS, to allow installing the macOS wheels.~
- Fixed wheel OS tag on macOS, to allow installing the macOS wheels, for real this time.

Known issues:

- The included libsndfile.dll for Windows only supports file descriptor open on Python 3.5+.
- Virtual IO (opening file-like Python objects) [is broken](https://cffi.readthedocs.io/en/latest/using.html#callbacks) on some versions of macOS and SELinux.

This is a pre-release

Includes updated binaries for Windows 32/64, and macOS x86_64/arm64.

Known issues:

- The included libsndfile.dll for Windows only supports file descriptor open on Python 3.5+.

- Improves README
- Improves error messages (thank you, Christoph Boeddeker)
- Improves tests (thank you, Matt Vollrath)
- Improves SoundFileInfo display (thank you, Hannes Helmholz)

Adds support for file system path protocol (PEP 519)

Bugfix release:

- improvements to build system
- improvements to documentation